Resources Contact Us Home
Decoding device for decoding a variety of code signals

Image Number 12 for United States Patent #5675331.

A decoding device is provided including a code FIFO memory unit for sequentially storing a bit stream, a barrel shifter for shifting and then outputting codes properly, an accumulator for computing the shift amount of the barrel shifter and issuing a request to read data to the code FIFO memory unit, a DCT coefficient decoder for decoding DCT coefficients, a variable-length code decoder for decoding variable-length codes other than DCT coefficients, a fixed-length code decoder for decoding fixed-length codes, a register unit for storing decoded data, a decoding controller for controlling the decoders in accordance with the decoded data stored in the register unit and decoded data output by the decoders and a memory controller for controlling operations to store DCT coefficients in a memory unit A. The DCT coefficient decoder, the variable-length code decoder and the fixed-length code decoder are connected in parallel to the output of the barrel shifter and the memory controller is controlled by the decoding controller. By virtue of this structure, the decoding device is capable decoding a bit stream comprising variable-length codes mixed with fixed-length codes. The decoding device is also capable of changing processing of a next code in accordance with decoded codes. Further, these operations can be implemented by means of a simple and reasonable configuration. On top of that, the process of decoding codes at a required high speed is carried out by an independent circuit, allowing the processing power of the decoding circuit to be enhanced.

  Recently Added Patents
String changing tool with a quick connector assembly and worm gear string cutter
Methods and systems for use in tracking targets for direction finding systems
Parallel active optical cable
Method for controlling operation of a wind turbine
Magnetic disk and manufacturing method thereof
Systems and methods of using dynamic data for wear leveling in solid-state devices
Information processing apparatus and power supply controlling method
  Randomly Featured Patents
Valve system for regulating the idling speed of Otto engines, particularly automobile engines
Disk recording and/or reproducing apparatus
Ballot system and method adapted for optical scanning
X-ray generator
Wired address compare circuit and method
Reticle projection system for video inspection apparatus
Water filtration system
Method and system for synchronizing opto-mechanical filters to a series of video synchronization pulses and derivatives thereof
Method and system for speech processing with greatly reduced harmonic and intermodulation distortion
Pipe structure and method of manufacture